| 摘要 |
PROBLEM TO BE SOLVED: To improve sound shield from external environments and to make it possible to listen a reproduced sound radiated from an electric-acoustic transducer element with fine reproducing characteristics. SOLUTION: The earphone is provided with a speaker unit 12 having a sound radiation hole 19 for radiating a reproduced sound, a speaker storing part 16 for storing the unit 12 so that the hole 19 is arranged on the inlet 4 of an external auditory, a sound absorbing tube 17 for absorbing a sound reflected by a tympanic membrane 5, an aperture part 14 formed on an insertion end opposed to the external auditory cancel 4, and an acoustic tube 13 closing the other end opposed to the aperture part 14. At the time of fitting the acoustic tube 13 to an article 1, the tube 13 forms a closed space together with the external auditory 3.
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